17
BÜCHI Distillation Unit K-314
6 Maintenance
Büchi’s customer service offers the following services:
• Replacement part service
• Repair service
• Maintenance service
• Technical consultation.
6.7 Main fuses
Please change the main fuses as follows::
• Pull out mains cables
• Pull out fuse holders 햲
• Replace the defective mains fuse by a new one with same
performance 햳:
- 230V: T 10A L 250V
• Insert again fuse holders
6.8 Checking the unit
In order to check that the unit is functioning properly, do a
nitrogen analysis using ammonia salt. For a standard
application, we recommend the following parameters:
Standard substance: Ammonium dihydrogen phosphate
p.A.
Molecular weight: 115.03
Nitrogen content: 12.17%
Originally weighed in: 400 to 500 mg
H
2
O: 20 ml
NaOH: 20 ml
Distillation time: 4 min
Titration: Sulphuric acid 0.5 N
Consumption: approx. 7-10 mL
Table 7: Checking th unit parameters
Fig. 14: Device plug, inserted
햲
햳
To Next Page
Loading...
